Following are links to professional organizations that have Web Sites relating to Turfgrass:

Turfgrass Producers International is the international association for Turfgrass producers.  The site has a significant amount of information relating to Turfgrass as well as links to many related sites.

National Turfgrass Evaluation Program (NTEP) provides test results for all major turfgrass species.  Millennium, Plantation and Masterpiece fescues tied for first place in the National Turfgrass Trials.

Other related Web sites are listed below:

American Seed Trade Association  
American Society of Agronomy
American Society of Landscape 
Arbor Day Institute  
Associated Landscape Contractors Association
Audubon Cooperative Sanctuary System
Center for Aquatic Weed Control
Environmental Protection Agency
GreenSearch, Inc.
Grounds Maintenance Magazine
Irrigation Association
Keep America Beautiful
Michigan State University 
Turfgrass Information Center
National Arborist Association
National Lawn & Garden Distributors Association
National Parks & Conservation Association
National Recreation & Park Association
National Wildlife Federation
Outdoor Power Equipment Institute
Professional Lawn Care Association of America
Soil & Water Conservation Society
Sports Turf Managers Association
Weed Science Society of America